I'm planning to switch my Ad Manager from zone-based to keyword based ads. So i tried to test it. I've created a publishing place with "Ads, based on the content of my page" option and integrated the code to one of my pages.

Now I have created an ad with keywords i'm using on certain of my pages. But: The ad doesn't appear. On some pages, I have the used keyword for the ad even in the title tag; but the ad doesn't appear...